The selling proposition of a self-cleaning surface is obvious and in fact self-cleaning coatings for cars and windows have been around for years.
自洁式表面的销售主张相当明确不说，事实上汽车及窗户用的自洁涂层已经行之有年。
The selling proposition of a self-cleaning surface is obvious and in fact self-cleaning coatings for cars and windows have been around for years.
自洁式表面的销售主张相当明确不说，事实上汽车及窗户用的自洁涂层已经行之有年。
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